Drum-trap.



No. 882,209. PATENTED MAR. 17, 1908. W. A. REID.

DRUM TRAP.

APPLICATION FILED JUNE 9, 1905.

UNITED STATESLPATENT oFFroE.

WILLIAM A. REID, OF ST. LOUIS, MISSOURI, ASSIGNOK TO N. O. NELSONMANUFACTURING COMPANY, OF Sl. LOUIS, MISSOIRI, A CORPfHiAlION.

DRUM-TRAP.

T 0 all whom it may concern:

Be it known that I, 'WILLIAM A. REID, a citizen of the United States,residing in the city of St. Louis, in the State of Missouri, haveinvented certain new and useful Improvements in Drum-Traps, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawing, forming part of this specification.

My invention relates to a drum trap for plumbing utility and theinvention has for its object to construct a trap of the type named insuch manner that it may be readily expanded or contracted longitudinallyto render it of such length that its upper end will occupy a positioncorresponding to the level of the floor of a building in which the trapis used. It frequently happens that when the plumbing pipes to which adrum trap is to be fitted are laid beneath a floor level, they areimproperly positioned for the connection of the drum trap thereto in amanner that will cause the top of the trap to correspond with the levelof the floor when the trap is connected to said pipes.

l/Vith a trap constructed in accordance With my improvement it may bereadily distended in length or shortened on making connection with thepipes, whereby the top of the trap is brought to the desired elevation.

Figure I is a view partly in elevation and partly in vertical section ofmy trap. Fig. II is an elevation of my trap set into the floor and inthe condition in which it is originally produced. Fig. III is a viewsimilar to Fig. II showing the trap contracted longitudinally to lessenits length. Fig. IV is a similar view to Figs. II and III, showing thetrap expanded longitudinally to increase its length.

1 designates the body of my trap, which is usually made of lead. Thewall of this body is corrugated annularly to provide a plurality ofconvolutions, preferably two in number, and one of which projectsoutwardly beyond the circumferential face in the shape of a bead 2 andanother of which extends inwardly from the first in the shape of aninwardly projecting bead 3, which is out of line with the inner face ofthe body 1.. By thus forming corrugations in the body of the trap, Ishorten its original length and so dispose the corrugated portions ofthe body that when the corrugations are obliterated or drawn out byexpansion the trap body will Specification off Letters Patent.

Application filed June 9, 1905.

Patented March 17, 1908.

Serial No. 264,367.

be lengthened. By this construction I also provide for contraction ofthe length of the trap when pressure is applied thereto in a directionlongitudinally of its body as a result of which the metal in thecorrugations is folded and the length of the trap body diminished. Bymaking a plurality of corru gations or beads in the body of the trap, Iprovide for the action of one of the corruga tions against another inthat an inwardly or outwardly extending portion of the trap body willgive inwardly or outwardly, as the case may be, against the oppositelydisposed corrugation, thereby rendering the act of expanding orcontracting the trap body one accomplished with much greater readinessand case than would be the result in making a single annular indentationor producing a single annular expanded portion in the trap body. Thisconstruction also provides for a much greater degree of expansion orcontraction of a trap body than would be possible with the formation ofa single expansion or indentation of the body.

4 designates the cover applied to the trap body which may be of anyordinary shape common to drum traps and for which no invention is hereinclaimed.

In Fig. II my trap is shown connected to an inlet and an outlet pipeleading thereto and therefrom and as'it appears seated in a pocketproduced therefor in the floor of a building. As illustrated in thisview the trap is in its normal condition, which condition it is allowedto retain, due to the pipes leading to and from it being properly placedin the floor.

In Fig. III the trap is shown in condition which is necessitated by thepipes leading thereto and therefrom being located in the floor at agreater elevation than they should properly be, and as a consequence ofwhich it is necessary to raise the trap so that the pipes may beconnected thereto at the proper points or, in other words at thelocations of the pipe openings. By so elevating the trap for theconnection of the pipes its upper end naturally protrudes above the[loor level and for the purpose of lowering the top of the trap to thefloor level it is contracted in length by pressure exerted endwise orlongitudinally of the trap body. When such pressure is applied thecorrugations in the trap body yield and become folded with the desiredresult.

In the trap as shown in Fig. IV the pipes Wall, near its upper end, apair of beads; one leading thereto and therefrom are illustrated of saidbeads extending inwardly beyond the as located at elevations too low forthe 5 inner plane of the remainder of the Wall of the proper connectionof the trap thereto= In drum and the other bead extending outview ofthis the body of the trap is length- Wardly beyond the outer plane ofthe reened by expanding it, such expansion being permitted by thecorrugations Which are 1 extending from the Wall of the drum. drawn outinto straight condition to render l l 1 WILLIAM A. REID.

In presence of NELLIE V. ALEXANDER, BLANCHE HOGAN.

the body of the desired length.

I claim as my invention:

A drum trap of soft metal having an open upper and a closed lower endand having in its 1 mainder of the Wall of the drum, and pipes

